首页|一维阵列涡旋光束在海面大气中的传输特性

一维阵列涡旋光束在海面大气中的传输特性

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  • 国家科技期刊平台
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相较于单涡旋光束,涡旋阵列光束能够扩充信息的传输容量,研究其传输特性对其光通信应用具有重要意义.本文选取阶数为n的螺旋因斯-高斯(HIGn,n)模式,采用海上大气折射率变换的功率谱,模拟海面大气湍流.基于相位屏法研究了一维阵列涡旋光束在海面大气湍流中光强、相位、闪烁因子和质心漂移的变化情况.结果表明:(1)HIGn,n模式的闪烁因子和质心漂移标准差随湍流强度以及大气湍流内尺度的增加而增加;(2)n为奇数的HIGn,n模式的闪烁因子随着阶数的增大而减小,且高于n为偶数的HIGn,n模式;(3)阶数n>1的HIGn,n模式比LG0,1 模式具有更好的稳定性;(4)阶数越高,HIGn,n模式的质心漂移标准差越小.其次,选取线性阵列涡旋光束(LAVBs)进行对比,研究得出虽然LAVBs比HIG光束具有更好的传输性能,但由于HIG光束具有独特的结构,故可适用于不同的应用场景.最后,分析了椭圆参量和椭圆环数对HIG模式传输的影响,结果表明适当地增大椭圆参量或椭圆环数有助于提高HIG模式的抗湍流能力.本文研究结果对涡旋光束的海上应用具有指导意义.
Propagation properties of one-dimensional array vortex beams in a marine atmosphere
Compared to a single vortex beam,vortex array beams can increase the information transmission capacity.Therefore,studying the propagation properties of vortex array beams is significant for their optical communication applications.In this paper,we select the helical Ince-Gaussian(HIGn,n)modes of order n and simulate the marine atmosphere turbulence using the power spectrum of the refractive index fluctuations in the marine atmosphere.The changes in intensity,phase,scintillation index and spot centroid wander of a one-dimensional array vortex beam in marine atmospheric turbulence have been investigated systematically by using the phase screen method.We find that(1)an increase in either the turbulence intensity or atmospheric turbulence inner scale enhances both the scintillation index and spot centroid wander standard deviation for HIGn,n modes;(2)the scintillation index of HIGn,n mode with odd n decreases with increasing mode order,and is higher than that of HIGn,n mode for even n;(3)the HIGn,n mode with order n>1 has better stability than the LG0,1 mode;and(4)the higher the mode order,the smaller the standard deviation of spot centroid wander of HIGn,n mode.In addition,we perform comparative study on the propagation performance of the linear ar-ray vortex beams(LAVBs)and HIG beams.Our study indicates that although LAVBs have better propaga-tion performance than HIG beams,the unique structures of HIG beams can be applied to various application scenarios.Finally,the effects of both the ellipticity parameter and elliptic ring number on the propagation of the HIG modes are explored and analyzed.The results show that increasing either the ellipticity parameter or elliptic ring number is beneficial to improving the anti-turbulence ability of the HIG modes.These results of-fer significant guidance for the offshore vortex beams application.

atmospheric opticshelical ince-gaussian modearray vortex beamscintillation indexturbu-lence

侯政诚、张明明、白胜闯、厉淑贞、刘俊、胡友友

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江苏科技大学理学院,江苏镇江 212000

浙江省光电探测材料及器件重点实验室,浙江宁波 315211

宁波大学高等技术研究院,浙江宁波 315211

大气光学 螺旋因斯高斯模式 阵列涡旋光束 闪烁因子 湍流

国家自然科学基金青年基金国家自然科学基金青年基金江苏省自然科学基金青年基金江苏省自然科学基金青年基金江苏省产学研合作项目江苏省高等学校自然科学研究面上项目浙江省光电探测材料及器件重点实验室开放基金

1210418912104190BK20190953BK20210874BY202068020KJB140008KLPMD2105

2024

10.37188/CO.2023-0094

中国光学
中国科学院长春光学 精密机械与物理研究所 中国光学学会

中国光学

CSTPCD北大核心
影响因子：2.02
ISSN：2095-1531
年,卷(期)：2024.17(2)
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